20745315

素因数分解:

$3^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{283}}^1$

素因数の和:481

約数の個数: 40

約数和(自身を含む): 37525488

約数和(自身を除く): 16780173

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 181, 283, 405, 543, 849, 905, 1415, 1629, 2547, 2715, 4245, 4887, 7641, 8145, 12735, 14661, 22923, 24435, 38205, 51223, 73305, 114615, 153669, 256115, 461007, 768345, 1383021, 2305035, 4149063, 6915105, 20745315]

約数ペア:

[(1, 20745315), (3, 6915105), (5, 4149063), (9, 2305035), (15, 1383021), (27, 768345), (45, 461007), (81, 256115), (135, 153669), (181, 114615), (283, 73305), (405, 51223), (543, 38205), (849, 24435), (905, 22923), (1415, 14661), (1629, 12735), (2547, 8145), (2715, 7641), (4245, 4887)]